Timetec 32GB KIT(4x8GB) Compatible for Apple DDR3L 1600MHz PC3L-12800 CL11 for iMac (Mid 2011, Late 2012, Late 2013, Late 2014 Retina 5K, Mid 2015 Retina 5K) SODIMM Memory Module MAC RAM Upgrade at Amazon.com
Install memory in an iMac - Apple Support
16GB Kit 2 x 8GB Memory for Apple iMac Retina 5K 27 inch (Late 2014) Core i5 / i7 DDR3L 1600MHz PC3L-12800 SODIMM RAM (PARTS-QUICK Brand) at Amazon.com
iMac with Retina 5K Display 2014/2015 Memory Upgrades
32GB Kit (4 x 8GB) PC3-12800 RAM for Apple iMac Late 2014 - 27 Inch Retina
iMac Retina 5K: Memory upgrade (RAM)
Memory upgrade: Apple iMac 2012/2013/2014 (Howto)
New Lower-Cost 2014 iMac Teardown Reveals Memory Not User-Upgradable
Upgrade your iMac's RAM in less than 5 minutes - YouTube
A-Tech 32GB Kit (4x8GB) RAM for Apple iMac (Late 2012, Late 2013, Late 2014, Mid 2015) | DDR3 1600MHz SODIMM PC3-12800 204-Pin SO-DIMM Max Memory Upgrade at Amazon.com
Install memory in an iMac - Apple Support
Memory in New $1099 iMac is Soldered and Not Upgradable - MacRumors
iMac with Retina 5K Display 2014/2015 Memory Upgrades
iMac with Retina 5K Display 2014/2015 Memory Upgrades
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
How to Upgrade RAM on MacBook Pro, iMac & More | AVG
Upgrade RAM on Apple Retina iMac 5K (Late 2015) / How To install memory - YouTube
Adamanta 16GB (2x8GB) Apple Memory Upgrade DDR3L 1600MHz SODIMM Compatible for iMac (Mid 2011, Late 2012, Early/Late 2013, Late 2014, Mid 2015), MacBook Pro (Early/Late 2011, Mid 2012), Mac Mini at Amazon.com